Browsing by Author "Mtenga, L.A."

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Assessment on the availability of cattle and feeds for quality beef production in Tanzanian
(ENRECA IGMAFU) Nandonde, S.W.; Tarimo, M.; Laswai, G.H.; Mgheni, D.M.; Mtenga, L.A.; Kimambo, A.E.; Madsen, J.; Hvelplund, T.; Weisbjerg, M.R.
Assessment on the availability of cattle and feeds for quality beef production in Tanzanian
(ENRECA IGMAFU, 2008) Nandonde, S.W.; Tarimo, M.; Laswai, G.H.; Mgheni, D.M.; Mtenga, L.A.; Kimambo, A.E.; Madsen, J.; Hvelplund, T.; Weisbjerg, M.R.
Growing demand for quality beef has motivated livestock keepers to finish cattle under feedlot. However, there is no reliable information on feed and animal resources that could sustainably support beef fattening in Tanzania.
Developmental changes of fat depots-in male Saanen goats
Mtenga, L.A.; Owen, E.; Muhikambele, V.R.M.; Kifaro, G.C.
Developmental changes of fat depots-in male Saanen goats
(2005) Mtenga, L.A.; Owen, E.; Muhikambele, V.R.M.; Kifaro, G.C.
Thirty-four male British Saanen goats were reared on milk substitutes from birth to weaning at 35 days and then given barley-based concentrate diet ad libitum. They were slaughtered serially at birth (3.5 kg), weaning (9.5 kg), 24.5,36.5, 48.5 and 72.5 kg live weights. Weights of fat depots were recorded. With the exception of channel fat, all fat depots increased significantly (P< 0.001) with increasing slaughter weight. Fat growth coeffients were greater than 1 (P<0.001) and was highest for subcutaneous fat (1.887), followed by gut fat (1.802), dissected fat I. 687), inter-muscular fat I.6I9) and lowest for channel fat I.I27). Relative to total fat, the greatest change in proportion of fat occurred between birth and 24.5 kg of live, weight. There were little consistent changes in proportion of subcutaneous fat relative to change in lotal body fat
Effect of level of inclusion of lablab meal in diet on carcass characteristic of Blackhead Persian Sheep
Muhikambele, V.R.M.; Mtenga, L.A.; Mafwere, W.D.
Effects of substituting sunflower seed cake with Acacia tortilis pods as protein source in supplementary diets of Small East African goats
Ntakwendela, L.; Mtenga, L.A.; Pereka, A.E.; Chenyambuga, S.W.; Laswai, G.H.; Kimambo, A.E.; Muhikambele, V.R.M.
Effects of substituting sunflower seed cake with Acacia tortilis pods as protein source in supplementary diets of Small East African goats
(2002) Ntakwendela, L.; Mtenga, L.A.; Pereka, A.E.; Chenyambuga, S.W.; Laswai, G.H.; Kimambo, A.E.; Muhikambele, V.R.M.
A study was undertaken to avaluate the effects of substituting sunflower seed cake with Acacia tortilis pods as a protein source in supplementing Small East African goats fed a basal diet of Brachiaria brizantha hay. Twenty-four growing female goats with mean body weight of 9. 71 = 1.56 kg were used in a growth experiment. Twelve adult bucks were used in a digestibility experiment. In the growth experiment the animals were divided into four groups, each with six animals, while for the digestibility experiment the animals were divided into four groups, each with three animals. These groups were randomly assigned to four supplementary diets containing different proportion of sunflower seed cake and Acacia tortilis pods. In treatments one (T1). two (T2); three (T3) and four (T4) sunflower seed cake was replaced with Acacia tortilis pods at levels of 0.0%, 3.33%, 66.7% and 100%, respectively. The intake of hay and total DM tended to increase with increasing levels of Acacia tortilts pods in the supplementary diet, the highest intake (430 g DM/day) was observed in goats offered supplementary diet T4. The CP intake (49.1 to 58.9g/day) did not differ significantly (P>0. 0.5). among the treatments. The intake of ME was significantly (P<0. 05) lower (3.0 MJ) for animals in T1 than those in T4 (3:7 MJ). In the digestibility trial, no significant (P>0.05) effect on apparent digestibility of DM, OM, CP and NDF on nitrogen utilisation was observed between treatments. In the growth trail, significant (P<0.05) lower growth rate was observed in animals under T1 (20g/day) than those in T3 (32g/day) and T4 (32g/day). Similarly the feed utilisation efficiency for animals in T1 (FCR=18.5) was significantly (p<0.05) lower than those of the animals in T3 (FCR=13.1) and T4 (FCR=13. 5). Replacement of sunflower seed cake with Acacia tortilis pods in the supplementary diets at the level of 66.7% and 100% gave the highest hay and total DM intake, daily live weight gain and feed utilisation efficiency. Therefore, Acacia tortilis pods may be used in place of high cost oil cakes in the feeding of goats.
Predicting of maximum forage intake capacity in cattle from degradability characteristics, passage rate and rumen pool size of NDF
Mgheni, D.M.; Weisbjerg, M.R.; Kimambo, A.E.; Hvelplund, T.; Madsen, J.; Mtenga, L.A.
Predicting of maximum forage intake capacity in cattle from degradability characteristics, passage rate and rumen pool size of NDF
(2005) Mgheni, D.M.; Weisbjerg, M.R.; Kimambo, A.E.; Hvelplund, T.; Madsen, J.; Mtenga, L.A.
An experiment (5 x 5 Latin Square) was conducted to estimate the physical fill of tropical forages and maximum intake capacity of five mature non-pregnant crossbred dairy heifers kept under zero grazing system. Five (5) forages [Brachiaria brizantha hay (BH), Maize (Zea mays) silage (MS), Lucerne (Medicago sativa) hay (LH), Lucerne and grass hay (LGH) and urea-treated rice straw (UTRS)) were used. The forages were fed as sole diets ad libitum with only minerals and vitamins supplements. Water was provided all the time and measured daily. Voluntary feed intake (VFJ) and faecal output were measured for seven days. Degradability characteristics were obtained in situ using the nylon bag technique. Rumen pool size of NDF was measured by rumen evacuation technique. Passage rates were calculated based on faecal output and rumen pool size of NDF. There was a marked difference (P<0. 000l) between the rate and extent at which NDF for tropical forages was degraded. The rate of passage (% h-1) was different (P<0.03) between forage diets with values ranging from 1.4 to 1.8 for MS and UTRS, respectively. Rumen pool sizes of NDF were different (P<0.01) between forage diets and weighed 4.8, 3.8, 4.7, 5.2 and 4.5 kg for BH, MS, LH, LGH and UTRS, respectively. Fill (days) also varied between forage diets and ranged from 1.4 for UTRS to 1.8 for MS. The intake capacity of animals for NDF were different (P<0.01), highest in animals fed LGH (5.0 kg-1) and lowest in animals fed MS 3.1 kg-1). Using predicted NDF intake (PNDFJ) based on NDF degradability characteristics and passage rates derived from faecal output and rumen pool size of NDF, good prediction of dry matter intake was obtained (R2 = 0.70). It was concluded that a system of describing the physical fill of NDF in tropical forages could be used to predict VFI in cattle.